That is very easy way to add your YouTube Subscribe Button to webpage or blog. You all can be add alot of YouTube Accounts subscribe button to your website. I've got this code from Google developers . You can do it by yourself or using below code it the same . Just change your YouTube channel Id like below image:

If you want more button , just copy and past it agian. That's good. Good Luck!!!

Code:
<script src="https://apis.google.com/js/platform.js"></script>
<div class="g-ytsubscribe" data-channelid="UC6AMNI1d7UpYP0HpTEW-_uw" data-layout="full" data-count="default"></div>

Preview one Button:


Preview Multi Button: